So I came home from work today and saw that my metal halide fixture was off. I thought "That's odd... the power switch is still on and it's getting juice" so I just turned the power switch off and waited about 15 minutes. When I came back, I flipped the switch on and bing! It worked fine! Ok cool... I'll just wait and see if it does it again. Sure enough, about two hours later the lights kicked off. This time I unplugged them and left them off. I know my bulbs are old, but it seems odd that BOTH bulbs in the fixture go out like this. Think it could be the ballast?